ember-cli-eslint, ember-cli-stylelint to run automatically only if desired - ember.js

Question

I understand that the purpose of ember-cli-eslint, ember-cli-stylelint to run automatically.
I am wondering if there is a way to control this behavior.
Like, run ember-cli-eslint, ember-cli-stylelint automatically only if there is certain ENVIRONMENT_VARIABLE or maybe write a custom script.
I am wondering if that is possible. Google search did not provide me any pointer.

Answer 1

Yes.
For ESLint:
Remove the addon ember-cli-eslint
Install the npm package eslint in your project
ESLint will then run only when you actually run ./node_modules/.bin/eslint .
You should update your package.json's lint:js script as well.
For Stylelint:
Remove the addon ember-cli-stylelint
Install the npm package stylelint in your project
Stylelint will then run only when you actually run ./node_modules/.bin/stylelint
You should update your package.json's lint:css script as well.

Answer 2

As suggested by #Turbo87 at https://github.com/ember-cli/ember-cli-eslint/issues/333 I have updated ember-cli-build.js like so:
const blacklist = [];
if (process.env.DISABLE_AUTO_LINT) {
blacklist.push('ember-cli-eslint', 'ember-cli-eslint');
}
let app = new EmberApp(defaults, {
addons: { blacklist },
});
And it works as desired.
A simplified package.json/script looks something like so:
"scripts": {
"eslint": "eslint .",
"stylelint": "stylelint app/styles",
"lint": "npm run eslint && npm run stylelint",
"start": "DISABLE_AUTO_LINT=true ember serve",
"test": "npm run lint --silent && DISABLE_AUTO_LINT=true ember exam --split=10 --parallel",
}
ember serve functions as business as usual.